Some of the ones we're testing here are from Sony (Puppy) and they seem to work pretty well. They have 128 Megs of storage on them as well. The one I have on my desk is pretty cool in that it will also encrypt / decrypt files and directories, as well as replace whichever password prompts you want it to, like for websites, e-mail clients, etc. The only thing is though it works by authenticating once a match to a fingerprint is made, so id doesn't acutally replace the password prompt... seems more for ease of use, although on the upside, you can create complex passwords of complete jibberish assigning them to fingerprints, therefor eliminating having to reset passwords due to someone forgetting a very complex password, so that works out pretty well...
